Engine-reversing shaft in explosion motors



Get. 2 1923.

V. REMBOLD ENGINE REVERSING SHAFT IN EXPLOSION MOTORS Filed Aug.

31, 1921 2 Sheets-Sheet 1 YW/Meme'sn Oct. 2 1923. 1,469,443

v. REMBOLD ENGINE REVERSING SHAFT IN EXPLOSION MOTORS Filed Aug. 31, 1921 2 sheets sheet 2 'WITNESSES irweulrofiz I includes the crank-pins connected with said,

Patented Get. 2, 1923.,

means- VICTOR REMBoL'n, or KIEL, GERMAN EneINE-nnvitns-Ine sneer IN Exr LosIoN Morons, j

Application-filedAugustin, 192i. Serial 1701497348 7 To allwhomz't may concern:

Be it known'that I, VICTOR REMBQLD, a

' citizen of Germany, residing'at Kiel, inthe 'German Republic, have invented new and useful Improvements relating to 'Engine- Tieve'rsmg Shafts 1n Explosion Motors (for which I have filed application in Germany,-

49,928,April 8, 1920), of'which the following is a specification.

This invention relates to engine-reversing shafts in explosion motors and more especially for. use on ships, said shaft being ordinarily controlled by and connected with the main engine-shaft through the intervention of coupling rods. This arrangement has the advantage that intermediate parts such as worm gear, or bevel-wheels, are not required and which von being out of order cannot be easily repaired on board ship and can only with difiiculty be replaced by a substitute in foreign ports.

My invention, therefore, resides in that the engine-reversing shaft is driven with but two coupling rods from the main engine-shaft in two-stroke motors, or from an intermediate shaft in four-stroke motors,

notwithstanding any elongation of the engine standards through piston -knocks or temperature-changes in existing tall forms of ships engine. pensating for the said elongation I arrange for that portion of the reversing shaft that coupling rods, to be so yieldingly mounted at the upper part of the motor as to be capable of swinging, or sliding with regard to the accoupled shaft-portions, while, furthermore, the bearings for the said shaft-portion are connected by means of rods with the bearings of the driving or power-transmitting shaft or, with the bed plate of the motor. The other portion of the reversing shaft with the cranks, which is mounted direct on the upper part of the motor, is actuated by the swinging shaft-portion through the intervention of a variable-coupling-crank with attached slide-blocks. I

In the accompanying drawings, Figs. 1 to 4:

Figure 1 is a diagram, in side elevation, partly shown in section, of a portion of a ships explosion motor fitted with the improved reversing gear; Fig. 1 is a planof the middle portion of the movable shaft; Fig. 2 shows in side elevation a portion of the reversing gear; Fig. 3 is a front e1eva-' For thepurpose of comview of one 'of-the variable 1 coupling c'r'anks-. f' In these drawmgs,a1s the motor crankshaft driving by means of toothed {wheels I) earner tw e-. ;:-:;.1

1 tion of the reversing -g'ear-;-Fig';4 is'aface 1 and c an'intermediate lay shaft dwhich by its cranks imparts movement tothe connect-- 5 1 mg rods eand' f secured to the middle'shaft portion g, whichwith the shaft'portions pand 9 forms the reversingshaft. The .-shaft portion 9 is carried in bearings h and 11 capable of swinging on pins u around which these parts form a swmgmg frame support 'ed by struts 7c and Z rigidly seated on the bed of the motor. The reversing cranks m and n, at opposite ends of the shaft portion I g, are fitted with radially movable blocks 0. The said reversing cranks drive alternately the reversibleshafts p and g'which carry the usual crank-arms and are mounted'in the bearings r. The bearingsr are directly conis capable of yielding to any appreciable elongation of the engine standards due "to piston knocks or to temperature effects Under such, c1rcumstances-the shaft-portion I] can moveparallel from its axialposltlon without affectingthe shaft portions pand g.

' WVhile I have herein shown anddescribed a three-part reversing shaft, it must be understood that the employment of three parts for this shaft is not essential, since a two- .part'arrangement may as well be used.

The mode of operation of the englne retogether with the parts and '93 which are V fixed thereon, will move upward according t the elongation of the frame.v In this event the middle partly of the reversing shaft will be made to yield by reasonof its swinging bearings and in consequence to frame.-

this, the distance between the two shafts d and g will always remain unchanged. If the middle or cranked part of the reversing shaft were rigidly coupled with the two other parts 79 and Q a strong pull would be exerted upon the reversing gear and the shaft (Z resulting in'a'n'excessive strain upon the shaft bearings. This disadvantage is ,avoided by my invention and the coupling rods; e and fwill neverexert' any injuriousaction in ease of an elongation "of-the engine reversing shaft, the one part of same being a swinging cranked member, connecting rods I 20 coupling. the latter with the said lay-cranke shaft, and yielding coupling means between the several parts of the reversing shaft.

2. In reversing gear for'explosion m0-. tors, the combination of a motor, a main crankshaft, a lay-crank-shaft driven by said main shaft, a superposed plural part:

reversin shaft one art I of same loein a,

7 s a V 2:

swinging"cranked member connecting rods coupling the latter with the said lay-crankshaft, yielding coujplingmeans betweent'he; V severalpar'ts 0f the reversing shaft, and means for shifting the outer parts fthe lat;

ter. 5 V V V a r T VICTOR REMBOLDI c 

